File _service:tar_scm:block-backend-Add-timeout-supp... of Package qemu

File _service:tar_scm:block-backend-Add-timeout-support-for-retry.patch of Package qemu

From b4bb154e6587b6d3fef819efcced803e309c4e05 Mon Sep 17 00:00:00 2001
From: yexiao <yexiao7@huawei.com>
Date: Thu, 21 Jan 2021 15:46:49 +0800
Subject: [PATCH] block-backend: Add timeout support for retry

Retry should only be triggered when timeout is not reached, so let's check
timeout before retry. Device should also reset retry_start_time after
successful retry.

Signed-off-by: Jiahui Cen <cenjiahui(a)huawei.com>
Signed-off-by: Ying Fang <fangying1(a)huawei.com>
Signed-off-by: Alex Chen <alex.chen@huawei.com>
---
 block/block-backend.c                       | 25 ++++++++++++++++++++-
 include/sysemu/block-backend-global-state.h |  1 +
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/block/block-backend.c b/block/block-backend.c
index e62808fc03..919699bb70 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -2149,6 +2149,29 @@ void blk_drain_all(void)
     bdrv_drain_all_end();
 }
 
+static bool blk_error_retry_timeout(BlockBackend *blk)
+{
+    /* No timeout set, infinite retries. */
+    if (!blk->retry_timeout) {
+        return false;
+    }
+
+    /* The first time an error occurs. */
+    if (!blk->retry_start_time) {
+        blk->retry_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
+        return false;
+    }
+
+    return qemu_clock_get_ms(QEMU_CLOCK_REALTIME) > (blk->retry_start_time +
+                                                     blk->retry_timeout);
+}
+
+void blk_error_retry_reset_timeout(BlockBackend *blk)
+{
+    if (blk->retry_timer && blk->retry_start_time)
+        blk->retry_start_time = 0;
+}
+
 void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
                       BlockdevOnError on_write_error)
 {
@@ -2180,7 +2203,7 @@ BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
     case BLOCKDEV_ON_ERROR_IGNORE:
         return BLOCK_ERROR_ACTION_IGNORE;
     case BLOCKDEV_ON_ERROR_RETRY:
-        return (blk->retry_timer) ?
+        return (blk->retry_timer && !blk_error_retry_timeout(blk)) ?
                BLOCK_ERROR_ACTION_RETRY : BLOCK_ERROR_ACTION_REPORT;
     case BLOCKDEV_ON_ERROR_AUTO:
     default:
diff --git a/include/sysemu/block-backend-global-state.h b/include/sysemu/block-backend-global-state.h
index 49c12b0fa9..7f59fd411d 100644
--- a/include/sysemu/block-backend-global-state.h
+++ b/include/sysemu/block-backend-global-state.h
@@ -84,6 +84,7 @@ int blk_commit_all(void);
 bool blk_in_drain(BlockBackend *blk);
 void blk_drain(BlockBackend *blk);
 void blk_drain_all(void);
+void blk_error_retry_reset_timeout(BlockBackend *blk);
 void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
                       BlockdevOnError on_write_error);
 bool blk_supports_write_perm(BlockBackend *blk);
-- 
2.27.0